$ time ./script.pl dict.txt 
Num. Line : 185866729 - Occ : 14900

real	0m39.453s
user	0m38.999s
sys	0m0.445s



$ perl -v

This is perl 5, version 16, subversion 2 (v5.16.2) built for darwin-thread-multi-2level
(with 3 registered patches, see perl -V for more detail)